Unior 1670.9/4 Cassette Lockring Tool w/ 12mm Guide Pin Description: The Unior 1670.9/4 Cassette Lockring Tool w/ 12mm Guide Pin is designed to install and remove Shimano and SRAM cassettes and internally splined Centerlock lockrings on hubs with a 12mm thru axle. This tool is crafted out of hardened tool steel that will shrug off use and abuse, and features specially designed teeth and an oversized guide pin for a tight engagement. The tool can either be attached to a torque wrench with a 1/2" drive for precision when tightening things down, on a 1/2" drive ratchet or breaker bar for the removal of tight and stubborn lockrings, or the tool has wrench flats that will accept an adjustable wrench. Features: Hardened tool steel construction will hold up to years of use and abuse 1/2" ratchet drive for use with breaker bars, ratchet drivers, and torque wrenches as well as wrench flats for adjustable wrenches Designed with oversized guide pin to securely engage cassette tool on hubs with a 12mm thru axle